diff options
| -rw-r--r-- | FL/Fl_Device.H | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/FL/Fl_Device.H b/FL/Fl_Device.H index 58f391c8d..6bf7cb675 100644 --- a/FL/Fl_Device.H +++ b/FL/Fl_Device.H @@ -67,8 +67,10 @@ class FL_EXPORT Fl_Surface_Device { static Fl_Surface_Device *surface_; // the surface that currently receives graphics requests static Fl_Surface_Device *default_surface(); // create surface if none exists yet protected: - /* Some drawing surfaces (e.g., Fl_XXX_Image_Surface_Driver) re-implement this. - Gets called each time a surface ceases to be the current drawing surface. */ + /** FLTK calls this each time a surface ceases to be the current drawing surface. + This member function is mostly of interest to developers of new Fl_Surface_Device derived classes. + It allows to perform surface-specific operations necessary when this surface ceases to be current. + Each implementation should end with a call to Fl_Surface_Device::end_current(). */ virtual void end_current() { surface_ = 0;} /** Constructor that sets the graphics driver to use for the created surface. */ Fl_Surface_Device(Fl_Graphics_Driver *graphics_driver) {pGraphicsDriver = graphics_driver; } |